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Home -> Community -> Mailing Lists -> Oracle-L -> RE: PGA
IIRC, even this release down to S_A_R_S stuff was a myth in earlier
releases. The MALLOC call never really returned the memory to the OS. Of
course, I don't have any earlier releases to prove it now! :)
Pete
"Controlling developers is like herding cats."
Kevin Loney, Oracle DBA Handbook
"Oh no, it's not. It's much harder than that!"
Bruce Pihlamae, long-term Oracle DBA
-----Original Message-----
Sent: Monday, March 31, 2003 10:09 AM
To: Multiple recipients of list ORACLE-L
>From the Manual:
SORT_AREA_SIZE specifies in bytes the maximum amount of memory Oracle will use for a sort. After the sort is complete, but before the rows are returned, Oracle releases memory down to the size specified by the SORT_AREA_RETAINED_SIZE parameter. After the last row is returned, Oracle releases the remainder of the memory.
Now since the memory is released you won't get a process error, and besides on a Unix machine it will just trigger the swapper into action which slows the entire machine down. Now if you want to know if the swapper is active, check out 'vmstat -s' and look for 'rotations of the clock hand'. Then check out the system's Uptime. Divide 'rotations of the clock hand' by uptime. If it's greater then or equal to 1, you've got a problem.
Dick Goulet
-----Original Message-----
Sent: Monday, March 31, 2003 10:59 AM
To: Multiple recipients of list ORACLE-L
If it is a myth where do we find the truth?
Allan
-----Original Message-----
Sent: Monday, March 31, 2003 8:19 AM
To: Multiple recipients of list ORACLE-L
Oracle Myth #1745
"When u set the sort_area_size for a database, it will allocate that much memory PER USER for any sort operation being performed on the database"
"GIVE a man a fish and he will eat for a day. But TEACH him how to fish, and...he will sit in a boat and drink beer all day"
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: =?iso-8859-1?q?Connor=20McDonald?= INET: hamcdc_at_yahoo.co.uk Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). ____________________________________________________________________________ __ This email is intended solely for the person or entity to which it is addressed and may contain confidential and/or privileged information. Copying, forwarding or distributing this message by persons or entities other than the addressee is prohibited. If you have received this email in error, please contact the sender immediately and delete the material from any computer. This email may have been monitored for policy compliance. [021216] -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Nelson, Allan INET: anelson_at_midf.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Goulet, Dick INET: DGoulet_at_vicr.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Pete Sharman INET: peter.sharman_at_oracle.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Mon Mar 31 2003 - 13:28:49 CST
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